Roller-mill and cutter.



Nlo. 709,084. Patented Sept. .|6, |902.

- W. A. DUNN.

BULLER MILL AND CUT-TER.`

(Applicatiun led Jan. 3, 1902.)

(Nb Model.)

` 2 sheen-sheet l.

Llull!!! W1/W.; .I 27g/7%@ v UNrTED S'iarns-l PATENT Prion,

VILLIINIABERCROMBIF. DUNN, OF SMITHVILLE, MINNESOTA, ASSIGNOR OF ONEHALF'lO ATHOL MORTON MILLER, OF DULUTH, MINNESOTA.

ROLLER-MILL AND CUTTER.

SPECIFICATION xormng part of Letters Patent No. 709.084, dated September16, 1902.

Anulcation tiled January 3. 1902. Serial No. 88,305. (No model.)

To (tI/Z whom, it may concern:

Be it known that l, WILLIAM ABERCROMBIE DUNN, a citizen ofthe UnitedStatemresiding` Cutters; and I do hereby declare the follow/4 ing to bea full, clear, and exact description of the invention, such as willenable othersv 1o skilled in the art to which it appertains to make anduse the same.

This invention relates to an improved ma-` chine or mill designed forthe construction of finished rolled-metal T-beams or angle beams l orbars.

The object of the invention is the production of the said types of beamsor bars from rolled I-beams and channel-beams, and while my improvementsare applicable to the makzo ing of what are known as Ts and angles fromI-beams and channels constructed by the processes at present practicedthe said improvements are designed more especially for use in connectionwith the process and apparatus for the manufacture of I-beams andchannels which form the subjects-matter of my applications for patents,filed January 3, 190,2, Serial Nos. 88,301 and 88,302.

The nature of my present improvements will be readily comprehended,reference being had to the following detailed description and to theaccompanying drawings,in which- Figure 1 is an elevation of machine ormill embodying my invention and designed t0 form Ts from I-beams. Fig.-2 is a similar view, partly broken away, of a mill for forming anglesfrom channel-beams. Fig. 3 is an enlarged sectional View, partly brokenaway, 4o showing the construction ot' the rolls and the severed Ts. Fig.4 is an enlarged sectional View of the finished angles. Fig. 5 is anelevation of a channel-finishing machine.

Referring to the drawings by numerals, l denotes the type of finishingmachine which I prefer to employ in connection with the process andapparatus for making channel-beams hereinbefore referred to, it beingunderstood that for finishing Lbeams a modification of 5o the shape ofthe rollers is alone necessary. In the making of Ts and angles,respectively, from I-beams and channels I employ a mill `constructedsubstantially similar to that illustrated in Fig. 5, with the differencethat centrally ofthe rolls l provide cutterblades, which in practiceoperate to sever the beam centrally to form Ts or angles, dependent uponthe type of beanrfurnished My present invention is more particularlyconcerned with the construction of cutter-blade 6o employed, although afeature of the improvemeut is the combination of cutter-blades withrolls designed to finish the product as it is severed.

Referring to Figs. l to 1I, inclusive, 2 de- 65 notes the frame of themill,in which is mounted a lower roll 3 and an upper roll 4, the latterbeing vertically adjustable by the means shown at 4'. These rollspreferably constitute the finishing-rolls, it being understood 7c byreference to my other applications hereinbefore referred to that thefinishing-rolls areemployed for the final pass of the metal. The shapeof the rolls is governed by the form of the beam, Fig. 2 showing rollsfor channels 75 and Fig. 3 the rolls for I-beams. Centrally of therolls'S 4t Vare the cutter-blades 5 5, each provided with two outerannular cutting edges 6 6 and an intermediate concave periphery 7. Inpractice the rolls are adjusted to pro- 8o Vide a very slight clearancebetween the cutting edges of the two blades, whereby the beam in passingbetween the rolls is practically severed, as illustrated more clearly inFig. 3. The inner ends of the Ts or angles, as the case may be. are bythe peculiar form and action of the cooperating blades provided with afinished surface, needing no dressing or other further treatment, and byreason of the intermediate concave peripheries of the 9o blades thecentral cut-away portion 8 ot' the beam receives such a shape incross-section as enables it subsequently to be readily rolled into rodsof circular or other form.

It will be understood from the foregoing that simultaneously with theoperation of severing the I-beams or channels into Ts or angles theoperation of finishing is `accomplished in a manner similar to thatperformed in the finishing-machine illustrated in Fig. loo 5, so thatthe one mill performs the double function of finishing the beam anddividing it longitudinally to form the Ts or angles. This provisionreduces the number of passes of the metal, thereby diminishing the costof production and increasing the capacity, and, moreover, by thepeculiar form of cutterblade employed not only is the T or anglefinished throughout, but there is saved the central portion, whichheretofore has been incapable of utilization.

.I claim as my inventionl. The combination of a pair of rolls forfinishing a shaped flanged beam having cylindrical web-rolling portions,cutter-blades on the rolls between the cylindrical web-rolling portions,each blade having two closelyadjacent cutting edges, the outer faces ofwhich are at a right angleto said cylindrical Web-rolling` portions forproducing finished edges on the finished severed portions of the beam.

beam, and the inner faces of which cutting 3o edges are beveled andprovide a concave rolling-surface for shaping the intermediate severedportion for further treatment.

In testimony whereof I affix my signature in presence ot' two witnesses.

WILLIAM ABERCROMBIE DUNN.

Witnesses:

W. T. NORTON, F. L. BRoWNE.

